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(No Model.) H. B. PORTER. BLEGTRIGAL MTOR.

No. 523,995. 'Patnted Aug. 7, 1894.

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'UNrrnD STATES PATENT OFFICE.

HENRY B. PORTER, OF NEW YORK, N. YQ

ELECTRECAL MOTOR.

SPECIFICATION forming part of Letters Patent No. 523,995, dated August'7, 1894. Application filed December 5, 1893. Serial No. 492.831. (Nomodel.)

construction and arrangement of parts here-- inafter set forth in detailand pointed out in the claims.

.Referring to the accompanying-drawings Figure 1, represents a pair ofmy improved motors and a driving shaft with a fly wheel thereon, showinga convenient method of securing connection between said motors and adriving shaft to communicate motion to the latter. Fig. 2, is a verticalsection of the motor through line 2--2 of Fig. 3, also showing across-section of the driving shaft with a device for alternatelychanging the current from one motoi t0 the other. Fig. 3, is an endelevation of the motor, and, Fig. et, is a plan view of the drivingshaft and the current regulating device shown in Fig. 2, also showing ashifter rod for adjusting the latter.

To explain in detaiL-a represents a bed or support upon which themotors, driving shaft and several connecting parts are supported; b, adriving shaft having one of its bearings op said bed; b a iiy-wheel onsaid shaft; b2, b reciprocating sliding-heads: 113,63 rods conn4ectingsaid sliding heads with a crank-arm b on the shaft b; c, c, my improvedmotors and c o reciprocating rods having connection with said slidingheads b2 b2 and operated by the motors to reciprocate said headandpperate the driving shaft through the medium of the connecting partsas described.

The construction of my improved motor is as follows :-c2 represents thesupporting frame or stand; ca c3 two helices which are formed with theircores c4 c4 projecting at each end thereof for the attraction of thearmature, and are supported by a suitable rod of nonconducting materialpassing through the Same and extending within suitable seats in theframe as more clearly shown in Fig. 3 to support the magnets in theirproper position.

A double armature, consisting of two swinging frames d and d pivoted tothe upper end of the frame as shown and formed in a manner to engagewith the core at each end of the helix and upon opposite sides thereof,is applied to each magnet. One of the parts d of the armature is ofgreater length than the other and at or near its end engages with ahorizontally arranged rod e, whichiis loosely supported to slide insuitable bearings f, in order to reciprocate the same and operate theconnecting head b2 as shown, or other mov` ing part of a machine orother device to which it might be attached. This engaging arm CZ of thearmature receives the combined inotive power from the two parts of thelatter when operated or attracted toward the core, by means of a pivotedlever h, which, at its opposite ends is provided with anti-frictionrolls h h thereon adapted to engage with the corresponding face orsurface of the two parts d and d ofthe armature, in order that the samemay be caused to move in unison when moving toward or from the core andone be caused to move the other alternately as the same are moved inopposite directions as will be readily understood; the short arm d thuscommunicating its power to the opposite arm CZ by means of this saidlever h.

Referring to Figs. 2 and 4, I have shown a device or means forautomatically changing the current from one motor to the other, when twoare employed for operating or rotating a driving shaft, in order thateach may alternately act to draw the reciprocating connecting rods backand forth and rotate the connecting shaft. This device consists of asleeve c' located upon said shaft in a manner to rotate therewith andalso slide horizontally thereon, the surface of which is divided intothree sections, the central sectionz" being of non-conducting materialand the end sections being formed of conducting and nonconductingmaterial as shown at i2 and t3, each forming half the circumference ofthe sleeve. The circuit from the battery j is alternately changed fi'omone motor to the other for the purpose as hereinbefore set forth, bymeans of two brushes it, k, forming one end ofthe circuit wires, whichengage with said sleeve IOO c' and alternately make and break thecircuit as the conducting or non-conducting surface of the sleeve is incontact with the same during the revolution of the shaft, as will bereadily understood.

The operation of the shaft may be stopped or reversed by shifting thesleeve on the shaft to bring the proper surface into contact with thebrushes, by means of a pivoted rod nt which engages therewith.

lllaving thus set forth my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

1. An electrical motor, consisting of a magnet, an armature consistingof two pivoted arms or frames operating in combination with said magnetfrom opposite sides thereof, and a pivoted lever operatin g incombination with the parts of said armature whereby the motlve powerfrom one of said parts may be communicated to the other, in a mannersubstantially as described and for the purpose set forth.

2. An electrical motor, consisting of a magnet, a double armatureconsisting of two pivoted arms or frames operating in combination withsaid magnet from opposite sides thereof, a sliding rod having connectionwith one of said parts of the armature, and a pivotcd lever operating incombination with said armature whereby one of its parts may receive themotive power from the other, substantially as described and for thepurpose set forth.

3. In combination with arotating shaft and a pair of electrical motorsprovided with reciprocating rods operated thereby and conneeted withsaid shaft through the medium of a crank-arm thereon, of a sleeve onsaid shaft having its perimeter divided into two sections formed ofconducting and non-conducting material respectively, and two brushesforming the end of the circuit wires from the two motors, having contactwith said sleeve whereby the current may be alternately changed from onemotor to the other, substantially as described and for the purpose setforth.

Ll. ln combination with a rotating shaft and a pair of electrical motorsprovided with reciprocating rods operated thereby and connected withsaid shaft through the medium of a crank-arm thereon, of a movablesleeve on said shaft havingits surface divided into sections ofconducting and non-conducting material substantially as set forth, andmeans for engaging with and adjusting said sleeve on its shaft,substantially as described and for the purpose set forth.

HENRY B. PORTER.

Vitnesses:

CHAs. F. DANE, A. L. HAYES.

